Abstract:
In this study three potential medicinal plants (Acacia nilotica
subsp. nilotica , Acacia polyacantha and Leptadenia
pyrotechnica) have been investigated. Four flavonoids have
been isolated and their partial structures have been deduced on
the basis of their spectral data. Phytochemical screening of
Acacia nilotica subsp. nilotica seed revealed the presence of
alkaloids, steroids, flavonoids, carbohydrates, tannins and
saponins. The following partial structure was proposed for
compound I isolated from this species:
The ethyl acetate ,ethanol, n-butanol and chloroform fractions
showed moderate to partial activity in the antimicrobial test.
Phytochemical screening of Leptadenia pyrotechnica leaves
revealed the presence of alkaloids, steroids, flavonoids,
carbohydrates, tannins and saponins. The following partial
structure was proposed for compound II isolated from this
species:
O
OCH3
OCH3
CH3
CH3
O
OH
OCH3
CH3
CH3
O
Sugar
v
However, all fractions of this species failed to show inhibitory
effect in the antimicrobial assay.
Phytochemical screening of Acacia polyacantha stem revealed
the presence of alkaloids, steroids, flavonoids, carbohydrates,
and saponins. The following partial structure was proposed for
compound III isolated from stems this species:
Different fractions of Acacia polyacantha stem showed
moderate to partial antimicrobial responses against test
organisms. The following partial structure was proposed for
compound IV isolated from Acacia polyacantha leaves:
All fractions of Acacia polyacantha leaves showed significant
activity against some test organisms
